Multiple changes to Course:

- Allow a start and end time for Course enrollment
- Allow Course to be editable

8 files changed, 106 insertions, 5 deletions

diff --git a/yaksh/forms.py b/yaksh/forms.py
index c6283c8..a0eee71 100644
--- a/yaksh/forms.py
+++ b/yaksh/forms.py
@@ -276,7 +276,8 @@ class CourseForm(forms.ModelForm):
 
     class Meta:
         model = Course
-        fields = ['name', 'active', 'enrollment', 'instructions']
+        fields = ['name', 'active', 'enrollment',
+            'start_enroll_time', 'end_enroll_time', 'instructions']
 
 
 class ProfileForm(forms.ModelForm):
diff --git a/yaksh/models.py b/yaksh/models.py
index 9e05af0..802a1fc 100644
--- a/yaksh/models.py
+++ b/yaksh/models.py
@@ -126,6 +126,24 @@ class Course(models.Model):
     teachers = models.ManyToManyField(User, related_name='teachers')
     is_trial = models.BooleanField(default=False)
     instructions = models.TextField(default=None, null=True, blank=True)
+
+    # The start date of the course enrollment.
+    start_enroll_time = models.DateTimeField(
+        "Start Date and Time for enrollment of course",
+        default=timezone.now,
+        null=True
+    )
+
+    # The end date and time of the course enrollment
+    end_enroll_time = models.DateTimeField(
+        "End Date and Time for enrollment of course",
+        default=datetime(
+            2199, 1, 1,
+            tzinfo=pytz.timezone(timezone.get_current_timezone_name())
+        ),
+        null=True
+    )
+
     objects = CourseManager()
 
     def request(self, *users):
@@ -134,6 +152,9 @@ class Course(models.Model):
     def get_requests(self):
         return self.requests.all()
 
+    def is_active_enrollment(self):
+        return self.start_enroll_time <= timezone.now() < self.end_enroll_time
+
     def enroll(self, was_rejected, *users):
         self.students.add(*users)
         if not was_rejected:
diff --git a/yaksh/templates/yaksh/courses.html b/yaksh/templates/yaksh/courses.html
index 970d488..075d5aa 100644
--- a/yaksh/templates/yaksh/courses.html
+++ b/yaksh/templates/yaksh/courses.html
@@ -78,8 +78,11 @@
                 </div>
             </div>
             <br/>
-            <button class="btn btn-primary pull-right"type="button" onClick='location.replace("{{URL_ROOT}}/exam/manage/addquiz/{{course.id}}/");'>Add New Quiz</button>
-            <p><a href="{{URL_ROOT}}/exam/manage/courses/download_course_csv/{{course.id}}">Download CSV</a></p>
+                <div class="btn-group" role="group" aria-label="...">
+                    <a class="btn btn-success" href="{{URL_ROOT}}/exam/manage/addquiz/{{course.id}}/">Add New Quiz</a>
+                    <a class="btn btn-primary"href="{{URL_ROOT}}/exam/manage/edit_course/{{course.id}}">Edit Course</a>
+                    <a class="btn btn-default"href="{{URL_ROOT}}/exam/manage/courses/download_course_csv/{{course.id}}">Download CSV</a>
+                </div>
         </div>
     </div>
     <br><br>
diff --git a/yaksh/templates/yaksh/quizzes_user.html b/yaksh/templates/yaksh/quizzes_user.html
index 72fce30..ce74844 100644
--- a/yaksh/templates/yaksh/quizzes_user.html
+++ b/yaksh/templates/yaksh/quizzes_user.html
@@ -13,11 +13,15 @@
                 {% elif user in course.rejected.all %}<span class="label label-danger">Request Rejected</span>
                 {% elif user in course.students.all %}<span class="label label-info">Enrolled</span>
                 {% else %}
+                    {% if course.is_active_enrollment %}
                         {% if course.is_self_enroll %}
                             <a class="btn btn-success" href="{{ URL_ROOT }}/exam/self_enroll/{{ course.id }}">Enroll</a>
                         {% else %}
                             <a class="btn btn-success" href="{{ URL_ROOT }}/exam/enroll_request/{{ course.id }}">Enroll</a>
                         {% endif %}
+                    {% else %}
+                        <span class="label label-danger">Enrollment Closed</span>
+                    {% endif %}
                 {% endif %}
              </div>
          </div>
diff --git a/yaksh/test_models.py b/yaksh/test_models.py
index f8f506a..7e14ce7 100644
--- a/yaksh/test_models.py
+++ b/yaksh/test_models.py
@@ -843,6 +843,29 @@ class CourseTestCases(unittest.TestCase):
         self.quiz1 = Quiz.objects.get(description='demo quiz 1')
         self.quiz2 = Quiz.objects.get(description='demo quiz 2')
 
+        # create courses with 
+        self.enroll_request_course = Course.objects.create(
+            name="Enrollment Request Course With Enrollment Disabled",
+            enrollment="Enroll Request",
+            creator=self.creator,
+            start_enroll_time=datetime(2015, 10, 9, 10, 8, 15, 0,
+                tzinfo=pytz.utc
+            ),
+            end_enroll_time=datetime(2015, 11, 9, 10, 8, 15, 0,
+               tzinfo=pytz.utc
+            ),
+        )
+        self.open_course = Course.objects.create(
+            name="Open Course With Enrollment Disabled",
+            enrollment="Open Course",
+            creator=self.creator,
+            start_enroll_time=datetime(2015, 10, 9, 10, 8, 15, 0,
+                tzinfo=pytz.utc
+            ),
+            end_enroll_time=datetime(2015, 11, 9, 10, 8, 15, 0,
+               tzinfo=pytz.utc
+            ),
+        )
 
     def test_is_creator(self):
         """ Test is_creator method of Course"""
@@ -926,6 +949,15 @@ class CourseTestCases(unittest.TestCase):
         self.assertIn(self.creator, trial_course.students.all())
         self.assertTrue(trial_course.is_trial)
 
+    def test_disabled_enrollment_for_open_course(self):
+        """Test to check enrollment is closed for open course"""
+        self.assertFalse(self.open_course.is_active_enrollment())
+
+    def test_disabled_enrollment_for_enroll_request_course(self):
+        """Test to check enrollment is closed for open course"""
+        self.assertFalse(self.enroll_request_course.is_active_enrollment())
+
+
 
 ###############################################################################
 class TestCaseTestCases(unittest.TestCase):
diff --git a/yaksh/test_views.py b/yaksh/test_views.py
index aa6561a..4e262dc 100644
--- a/yaksh/test_views.py
+++ b/yaksh/test_views.py
@@ -884,7 +884,9 @@ class TestAddCourse(TestCase):
         response = self.client.post(reverse('yaksh:add_course'),
             data={'name': 'new_demo_course_1',
                 'active': True,
-                'enrollment': 'open'
+                'enrollment': 'open',
+                'start_enroll_time': '2016-01-10 09:00:15',
+                'end_enroll_time': '2016-01-15 09:00:15',
             }
         )
         course_list = Course.objects.all().order_by('-id')
@@ -892,7 +894,6 @@ class TestAddCourse(TestCase):
         self.assertEqual(new_course.name, 'new_demo_course_1')
         self.assertEqual(new_course.enrollment, 'open')
         self.assertEqual(new_course.active, True)
-
         self.assertEqual(response.status_code, 302)
         self.assertRedirects(response, '/exam/manage/')
 
diff --git a/yaksh/urls.py b/yaksh/urls.py
index ad58985..05d167e 100644
--- a/yaksh/urls.py
+++ b/yaksh/urls.py
@@ -56,6 +56,7 @@ urlpatterns = [
         views.download_csv),
     url(r'manage/courses/$', views.courses, name='courses'),
     url(r'manage/add_course/$', views.add_course, name='add_course'),
+    url(r'manage/edit_course/(?P<course_id>\d+)$', views.edit_course, name='edit_course'),
     url(r'manage/course_detail/(?P<course_id>\d+)/$', views.course_detail, name='course_detail'),
     url(r'manage/enroll/(?P<course_id>\d+)/(?P<user_id>\d+)/$', views.enroll),
     url(r'manage/enroll/rejected/(?P<course_id>\d+)/(?P<user_id>\d+)/$',
diff --git a/yaksh/views.py b/yaksh/views.py
index 2adc2c3..7208e82 100644
--- a/yaksh/views.py
+++ b/yaksh/views.py
@@ -614,10 +614,43 @@ def add_course(request):
 
 
 @login_required
+def edit_course(request, course_id=None):
+    user = request.user
+    ci = RequestContext(request)
+    if course_id:
+        course = Course.objects.get(id=course_id)
+    else:
+        course = None
+
+    if not is_moderator(user):
+        raise Http404('You are not allowed to view this page')
+    if request.method == 'POST':
+        form = CourseForm(request.POST, instance=course)
+        if form.is_valid():
+            new_course = form.save(commit=False)
+            new_course.creator = user
+            new_course.save()
+            return my_redirect('/exam/manage/')
+        else:
+            return my_render_to_response('yaksh/add_course.html',
+                                         {'form': form},
+                                         context_instance=ci)
+    else:
+        form = CourseForm(instance=course)
+        return my_render_to_response('yaksh/add_course.html', {'form': form},
+                                     context_instance=ci)
+
+
+@login_required
 def enroll_request(request, course_id):
     user = request.user
     ci = RequestContext(request)
     course = get_object_or_404(Course, pk=course_id)
+    if not course.is_active_enrollment:
+        msg = 'Enrollment for this course has been closed, please contact your '\
+            'instructor/administrator.'
+        return complete(request, msg, attempt_num, questionpaper_id=None)
+
     course.request(user)
     if is_moderator(user):
         return my_redirect('/exam/manage/')
@@ -676,6 +709,11 @@ def enroll(request, course_id, user_id=None, was_rejected=False):
         raise Http404('You are not allowed to view this page')
 
     course = get_object_or_404(Course, pk=course_id)
+    if not course.is_active_enrollment:
+        msg = 'Enrollment for this course has been closed, please contact your '\
+            'instructor/administrator.'
+        return complete(request, msg, attempt_num, questionpaper_id=None)
+
     if not course.is_creator(user) and not course.is_teacher(user):
         raise Http404('This course does not belong to you')